guiro

Semi-physical model of a guiro sound.

It is one of the PhISEM percussion opcodes. PhISEM (Physically Informed Stochastic Event Modeling) is an algorithmic approach for simulating collisions of multiple independent sound producing objects.

Syntax

ares guiro kamp, idettack [, inum] [, idamp] [, imaxshake] [, ifreq] [, ifreq1]

Initialization

idettack -- period of time over which all sound is stopped

inum (optional) -- The number of beads, teeth, bells, timbrels, etc. If zero, the default value is 128.

idamp (optional) -- the damping factor of the instrument. Not used.

imaxshake (optional, default=0) -- amount of energy to add back into the system. The value should be in range 0 to 1.

ifreq (optional) -- the main resonant frequency. The default value is 2500 Hz.

ifreq1 (optional) -- the first resonant frequency. Default value here is 4000 Hz

Performance

kamp -- Amplitude of output. Note: As these instruments are stochastic, this is only an approximation.

Examples

Here is an example of the guiro opcode. It uses the file guiro.csd.

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac     ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o guiro.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

instr 1

a1  guiro .8, p4
    outs a1, a1

endin
</CsInstruments>
<CsScore>

i1 0 1  1
i1 + 1 .01
e
</CsScore>
</CsoundSynthesizer>

See Also

Models and Emulations

Credits

Author: Perry Cook, part of the PhISEM (Physically Informed Stochastic Event Modeling)
Adapted by John ffitch
University of Bath, Codemist Ltd.
Bath, UK

New in Csound version 4.07

Added notes by Rasmus Ekman on May 2002.